Momentum is a VECTOR quantity because it involves MAGNITUDE AND DIRECTION.
A vector quantity is a quantity which has both magnitude and direction. The formula for momentum is mass x velocity. The mass is a scalar quantity while the velocity is a vector quantity; scalar multiply by vector quantity will give vector quantity .<span />
A shield volcano<span> is a type of volcano usually built almost entirely of fluid magma flows</span>
It is the theory that the landscape around took years to be made by nature so in another few years it could make new landscapes appear.